Cement-applying machine



H. G. ELLIS ET AL CEMENT APPLYING MACHINE Aug. 28, 1928.

Filed April 12, 1927 Mi x t w wa v a w n .m 1a,; Mr aw my; flaw fi w W. W Mu Patented Aug. 28, 1928.

UNITED STATES PATENT OFFICE.

HOWARD G. ELLIS, OF WALTHAM, AND HERBERT A. MATHIS, OF WATEBTQWN, MAS- SLCHUSETTS, ASSIGNORS T0 HOOD RUBBER COMPANY, OF WATER-TOWN, MASSA- CHUSETTS, A. CORPORATION OF MASSACHUSETTS.

CEMENT-APPLYING MACHINE.

Application filed April 12,

()ur invention relates to improvements in cementing machlnes such as are used for applying cement to one surface of a sheetor stri of material adjacent the edge thereof, of t 1e type provided with a lower strip supporting or pressin roller, and an uppercement applying roller to the surface of which the cement is applied by suitable feeding means such for example as a tank or reservoir; the rolls being usually driven in unison, and being spaced apart a distance approximately equal to the thickness of the strip. buch machines are extensively used in the manufacture of canvas and rubber footwear in which case a rubber cement is used.

In the use of such machines it is supposed that the upper surface of the Strip will absorb or take up cement from the upper or applying roller while the lower surface will remain clean and free from cement which it should do. We have found, in practice however, that when a strip is passed between the rollers, at the time its advanced edge enters the bightthereof, or that at which its rear edge emerges therefrom, there is a tendency for the cement to be squeezed out ahead or behind the strip, particularly the latter, forming so called globs over the ends which may exceed in thickness the spacing between the rollers and therefore touch the lower roller and adhere thereto. If allowed to remain and accumulate it mars or detrimentally affects the surface which should remain clean.

The present invention aims to provide simple and economical means which may be readily attached to the existing types of cementing machines to automatically free the lower roller from any adhering cement, and the invention includes the novel features of construction and arrangement and combination of parts hereinafter described, the nature 'and scope of my invention being defined and ascertained by the claims appended hereto.

What we at present consider the preferred embodiment of the invention is illustrated in the accompanying drawings in which Figure 1 is a side elevation partly broken away of a cementing machine which, as it is supposed to be of the known type, except as hereinafter described. is of a conventional showing.

1927. Serial No. 183,124.

Fig. 2 is an end elevation, and

Fig. 3 is a sectional detail on a larger scale.

Referring by reference characters to this drawing the numeral 1 designates the u per cement applying roller carried by the lead 2 of an arm of the sewing machine frame type and supplied with cement in the usual manner from a suitable tank. l i

3 desi nates the lower or work supporting roller carried on a shaft journaled in the lower arm 4, which presses the strip against the upper roller duringits passage therebetween, it being customary to have the rollers 1 and 3 mounted on the ends of shafts driven in unison by suitable gearing, the free end of the shaft carrying rollers 3 being adjustable to vary distance of said roller 3 from roller 1 according to the thickness of strips being operated on, etc, all of which will be readily understood by those skilled in the art.

In order to remove any cement which may accidentally adhere to the roller 3 as hereinbefore set forth, I provide an idle roller 5 of relatively small diameter mounted to rotate on an axis parallel to the axis of roller 3 and with its periphery in close proximity thereto.

We have found that if the roller 5 be made of metal and provided with a wrapping of adhesive tape as indicated at 5 it serves very effectively to pick up or remove from the surface of the roller 3 any cement which may have adhered thereto. This we believe is due to the superior tackiness of the tape, the difference in size of rollers 3 and 5 and the fglct that roll 3 is driven while roll 5 is free or 1 e.

As the cement accumulates on the pick up roller 5 it is pressed or deflected laterally until it forms globs on each side of the roller 3 as indicated by dotted lines, which may be removed by an operator from time to time.

The pick up roller should be mounted so as to be adjustable towards and from the roll 3, and to enable this to be accomplished in a simple manner and one which will enable the roller to be readily applied to existing types of machines, I proceed in the following manner.

The end of the arm 4 is provided with a cylindrical recess (by boring or drilling or the 11' ke inwhich is seated a cylindricblock 6.

This in turn has a small cylindric recess disposed to one side of the center or axis of block 6, or in other words eccentric thereto, into which is inserted the end of a pin '7 with a drive fit. Pin 7 acts as a journal or shaft for roller 5 which is made in the form of a sleeve and slipped onto pin 7 prior to its being driven into the eccentric bushing. Endwise movement of the sleeve or roller 5 on shaft 7 is prevented by a head 7 on the outer end of the shaft preferably countersunk into the end of the sleeve or roller, and a collar 8 abutting against the other end of the sleeve or roller and locked in position by means such as'the' set screw shown.

The eccentric shaft supporting member or bushing 6 is mounted with a snug but 'free lit "in the recess in the member 2 so as to be capable of being rotated therein to adjust the shaft 7 and roller 5 nearer to or further from the roller 3,,and it is locked in the desired position by set screw 9.

1 WVe claim: g

1. In a cementing machine having a cementapplyingroller and a juxtaposed work supm porting roller and a fixed frame part adjacent said'supporting roller, said frame part having a cylindric recess the axis of which is parallel to the axis of said supporting roller, a

I cylindric block seated in said recessand having an eccentricallyflocatedrecess, a pin or shatt havmg one end" seated 1n said'eccentrically locatedrecess, a take up roller carried by said pin or sha ft and having its periphery located in close proximity to said supporting roller, and means for locking said cylindric block in its holding recess.

2. In a cementing machine having a cement applying roller and a juxtaposed work supporting roller and a fixed frame part adjacent said "upporting roller, said frame part having a cylindric recess the axis of which is parallel to'the axis of said supporting roller, a cylindric block seated in said recess and having an cccentrically located rcces a pin or shaft having one end held in said recess, said pin or shaft having a hcaded outer end, and an adjustable collar spaced therefrom, and a hollow roller journaled on said pin or shaft between its head and collar. v

3. In acementing machine having a cement applying roller and a juxtaposed work supporting roller' and a fixed frame part adj accnt said supporting roller, arotatable member carried by said frame part, a pin or shaft having one end carried by said rotatable member at one side of the axis of rotation thereof, a pick-nproller carried by said pin or shaft, andmeans for locking said rotatable member against movement.

In te-tilnony whereof, we affix our signatures.

IIOIVARD G. ELLIS. HERBERT A. h'lA'iI-ll 

